Power supply test system

ABSTRACT

A power supply test system includes a test chamber, a switch module, a temperature detecting unit, a control module, and a refrigerating and heating module. The test chamber accommodates a power supply. The switch module inputs a predetermined temperature value. The temperature detecting unit detects temperature signals in the test chamber. The control module receives the temperature signals. The refrigerating and heating module receives a first control signal from the control unit when a value of the temperature signal is less than the predetermined temperature value. The refrigerating and heating module heats the test chamber. The refrigerating and heating module receives a second control signal from the control unit when a value of the temperature signal is greater than the predetermined temperature value. The refrigerating and heating module refrigerates the test chamber until the value of the temperature signal is equal to the predetermined temperature value.

BACKGROUND

1. Technical Field

The present disclosure relates to a power supply test system for testing reliability of a power supply.

2. Description of Related Art

Computer power supplies are capable of rectifying alternating current into direct current. The reliability of a power supply is measured by comparing the input and output voltages of the power supplies. Burn in testing is an important test in determining the reliability of the power supply. A typical burn in test uses a test chamber to test a power supply under different temperatures. However, the typical test chamber uses thermal resistors to heat the power supply. The temperature increases slowly and the temperature control may not be precise.

Therefore there is a need for improvement in the art.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the embodiments can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.

FIG. 1 is a block diagram of an embodiment of a power supply test system, the system including a switch module, a temperature detecting unit, a control module, a refrigerating and heating module, a decoding module, a display module, a display module, and a power module.

FIG. 2 is a circuit diagram of the switch module, the temperature detecting unit, and the control module of FIG. 1.

FIG. 3 is a circuit diagram of the refrigerating and heating module and the power module of FIG. 1.

FIG. 4 is a circuit diagram of the decoding module and the display module of FIG. 1.

DETAILED DESCRIPTION

The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one”.

FIG. 1 illustrates a power supply test system in accordance with an embodiment. The power supply test system is adapted to test reliability of a power supply 810 under a predetermined temperature in a test chamber 800. The power supply test system includes a switch module 100, a temperature detecting unit 200, a control module 300, a refrigerating and heating module 400, a decoding module 500, a display module 600, and a power module 700. The switch module 100 is adapted to input a predetermined temperature value in the control module 300. The temperature detecting unit 200 is adapted to detect temperature signals in the test chamber 800 and transmit the temperature signals to the control module 300. When a value of the temperature signal is less than the predetermined temperature value, the control module 300 transmits a first control signal to the refrigerating and heating module 400 and the refrigerating and heating module 400 heats the test chamber 800. When the value of the temperature signal is greater than the predetermined temperature value, the control module 300 transmits a second control signal to the refrigerating and heating module 400, and the refrigerating and heating module 400 refrigerates the test chamber 800 until the value of the temperature signal is equal to the predetermined temperature value. The power module 700 is adapted to provide working voltages to the refrigerating and heating module 400. In one embodiment, the temperature detecting unit 200 and the refrigerating and heating module 400 are positioned in the test chamber 800.

FIG. 2 to FIG. 4 illustrate a circuit diagram of the switch module 100, the temperature detecting unit 200, the control module 300, the refrigerating and heating module 400, the decoding module 500, the display module 600, and the power module 700. The switch module 100 includes a plurality of push buttons S0-S9. The control module 300 includes a micro controller 310 and a single-pole double-throw (SPDT) S10. The micro controller 310 includes a plurality of first control signal output terminals PA0, PA2, PA4, PA6, a plurality of second control signal output terminals PA1, PA3, PA5, PA7. A serial data signal output terminal PB0, a clock signal output terminal PB1, a first switch output terminal PB2, a second switch output terminal PB3, a temperature signal input terminal PC0, and a plurality of data input terminals PC1-PC7. The SPDT S10 includes a first terminal, a second terminal, and a third terminal. The temperature detecting unit 200 transmits the temperature signals to the control module 300 by the temperature signal input terminal PC0. First terminals of the push buttons S0 and S5 are electrically connected to the data input terminal PC1. First terminals of the push buttons S1 and S6 are electrically connected to the data input terminal PC2. First terminals of the push buttons S2 and S7 are electrically connected to the data input terminal PC3. First terminals of the push buttons S3 and S8 are electrically connected to the data input terminal PC4. First terminals of the push buttons S4 and S9 are electrically connected to the data input terminal PC5. Second terminals of the push buttons S0-S4 are electrically connected to the data input terminal PC6. Second terminals of the push buttons S5-S9 are electrically connected to the data input terminal PC7.

The refrigerating and heating module 400 includes a plurality of relay control units 410 and refrigerating and heating units 420. Each of the plurality of relay control units 410 includes a first winding unit M1, a second winding unit M2, a first switch unit K1, a second switch unit K2, a third switch unit K3, and a fourth switch unit K4. First terminals of each first winding unit M1 are electrically connected to the first control signal output terminals PA0, PA2, PA4, PA6 to receive the first control signal. Second terminals of each first winding unit M1 receive a first DC voltage. First terminals of the first switch units K1 and the second switch units K2 of the plurality of relay control units 410 are electrically connected to the power module 700 to receive a second DC voltage. First terminals of each first switch unit K1 are electrically connected to an anode of the second DC voltage. First terminals of each second switch unit K2 are electrically connected to a cathode of the second DC voltage. Second terminals of the first switch units K1 and the second switch units K2 of the plurality of relay control units 410 are electrically connected to the refrigerating and heating units 420.

First terminals of each second winding unit M2 are electrically connected to the second control signal output terminals PA1, PA3, PA5, PA7 to receive the second control signal. Second terminals of each second winding unit M2 receive the first DC voltage. First terminals of each third switch unit K3 are electrically connected to the cathode of the second DC voltage. First terminals of each fourth switch unit K4 are electrically connected to the anode of the second DC voltage. Second terminals of the third switch units K3 and the fourth switch units K4 of the plurality of relay control units 410 are electrically connected to the refrigerating and heating units 420. In one embodiment, the first DC voltage is +5V.

The decoding module 500 includes a plurality of registers U0-U3. Each of the plurality of registers U0-U3 includes two serial data input terminals a1, a2, a clock signal input terminal a3 and a plurality of digital signal output terminals b1-b8. The serial data input terminals a1, a2 of the register U0 are electrically connected to the serial data signal output terminal PB0 of the micro controller 310. The serial data input terminals a1, a2 of the register U1 are electrically connected to the digital signal output terminal b8 of the register U0. The serial data input terminals a1, a2 of the register U2 are electrically connected to the digital signal output terminal b8 of the register U1. The serial data input terminals a1, a2 of the register U3 are electrically connected to the digital signal output terminal b8 of the register U2. The clock signal input terminals a3 of the plurality of registers U0-U3 are electrically connected to the clock signal output terminal PB1 of the micro controller 310. The first terminal and the second terminal of the SPDT S10 are electrically connected to the first switch output terminal PB2 and the second switch output terminal PB3 of the micro controller 310. The third terminal of the SPDT S10 is electrically connected to the clock signal input terminals a3 of the plurality of registers U0-U3.

The display module 600 includes a plurality of eight-segment numeral tubes D0-D3. Each of the plurality of eight-segment numeral tubes D0-D3 includes a plurality of digital signal input terminals c1-c8. The plurality of digital signal input terminals c1-c8 of the plurality of eight-segment numeral tubes D0-D3 are electrically connected to the plurality of digital signal output terminals b1-b8 of the plurality of registers U0-U3.

The power module 700 includes a plurality of voltage decreasing circuits 710 and rectification circuits 720. Each of the plurality of voltage decreasing circuits 710 includes a transformer T. Each of the plurality of rectification circuits 720 includes four diodes electrically connected together end to end. Each of the plurality of voltage decreasing circuits 710 receives a 220V AC voltage signal and converts the 220V AC voltage signal to a 16V AC voltage signal. Each of the plurality of rectification circuits 720 receives the 16V AC voltage signal and converts the 16V AC voltage signal to a +16V second DC voltage. The +16V second DC voltage is provided to the refrigerating and heating units 420.

In a working state, the power supply 810 is put in the test chamber 800. The plurality of push buttons S0-S9 is pushed to input the predetermined temperature value in the micro controller 310. The plurality of push buttons S0-S9 represents numbers 0-9 respectively. The temperature detecting unit 200 detects the temperature signals in the test chamber 800, and transmits the temperature signals to the micro controller 310 via the temperature signal input terminal PC0. The micro controller 310 compares the value of the temperature signal with the predetermined temperature value. When the temperature detecting unit 200 detects the value of the temperature signal is less than the predetermined temperature value, the plurality of second control signal output terminals PA1, PA3, PA5, PA7 of the micro controller output low voltage level second control signals to the second winding units M2. The second winding units M2 are powered on to close the third switch units K3 and the fourth switch unit K4. The refrigerating and heating units 420 receive an inverted second DC voltage and generate heat.

The temperature in the test chamber 800 increases as the refrigerating and heating units 420 generate heat. When the temperature detecting unit 200 detects the value of the temperature signal is greater than the predetermined temperature value, the first control signal output terminals PA0, PA2, PA4, PA6 of the micro controller 310 output low voltage level first control signals to the first winding units M1. The first winding units M1 are powered on to close the first switch units K1 and the second switch units K2. The refrigerating and heating units 420 receive the second DC voltage and refrigerate in the test chamber 800 until the value of the temperature signal is equal to the predetermined temperature value. At least one of the first control signal output terminals PA0, PA2, PA4, PA6 and the second control signal output terminals PA1, PA3, PA5, PA7 of the micro controller 310 outputs a high voltage level control signal to the first winding unit M1 and the second winding unit M2. At least one of the first control signal output terminals PA0, PA2, PA4, PA6 and the second control signal output terminals PA1, PA3, PA5, PA7 is powered off to open the switch units K1-K4. The value of the temperature signal keeps the predetermined temperature value in the test chamber 800.

Even though numerous characteristics and advantages of the present disclosure have been set forth in the foregoing description, together with details of the structure and function of the disclosure, the disclosure is illustrative only, and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

What is claimed is:
 1. A power supply test system for testing reliability of a power supply, the power supply test system comprising: a test chamber configured to accommodate the power supply; a switch module adapted to input a predetermined temperature value; a temperature detecting unit adapted to detect a temperature signal in the test chamber; a control module adapted to receive the temperature signal; and a refrigerating and heating module, wherein the control module sends a first control signal to the refrigerating and heating module when a value of the temperature signal is less than the predetermined temperature value, the refrigerating and heating module is adapted to heat the test chamber upon receiving the first control signal; the control module sends a second control signal to the refrigerating and heating module when a value of the temperature signal is greater than the predetermined temperature value, the refrigerating and heating module is adapted to refrigerate the test chamber upon receiving the second control signal until the value of the temperature signal is equal to the predetermined temperature value.
 2. The power supply test system of claim 1, wherein the control module comprises a micro controller comprising at least one first control signal output terminal; the refrigerating and heating module comprises at least one first relay control unit and a refrigerating and heating unit; the first relay control unit comprises a first winding unit, a first switch unit, and a second switch unit; a first terminal of the first winding unit is electrically connected to the first control signal output terminal to receive the first control signal; a second terminal of the first winding unit receives a first DC voltage; a first terminal of the first switch unit is electrically connected to an anode of a second DC voltage; a first terminal of the second switch unit is electrically connected to a cathode of the second DC voltage; and second terminals of the first switch unit and the second switch unit are electrically connected to the refrigerating and heating units.
 3. The power supply test system of claim 2, wherein the micro controller further comprises at least one second control signal output terminal; the first relay control unit further comprises a second winding unit, a third switch unit, and a fourth switch unit; a first terminal of the second winding unit is electrically connected to the second control signal output terminals to receive the second control signal; a second terminal of the second winding unit receives the first DC voltage; a first terminal of the third switch unit is electrically connected to the cathode of the second DC voltage; a first terminal of the fourth switch unit is electrically connected to the anode of the second DC voltage; and second terminals of the third switch unit and the fourth switch unit are electrically connected to the refrigerating and heating units.
 4. The power supply test system of claim 3, wherein the switch module comprises at least one first switch and one second switch; the micro controller further comprises a temperature signal input terminal, at least one first data input terminal, and a second data input terminal; first terminals of the first switch and the second switch are electrically connected to the temperature signal input terminal; and second terminals of the first switch and the second switch are electrically connected to the first data input terminal and the second data input terminal respectively.
 5. The power supply test system of claim 4, further comprising a decoding module electrically connected to the control module, and a display module electrically connected to the decoding module; and the decoding module decodes the temperature signals to temperature values and display the temperature values on the display module.
 6. The power supply test system of claim 5, wherein the micro controller further comprises a serial data signal output terminal; the decoding module comprises at least one first register and one second register; each of the first register and the second register comprises two serial data input terminals and a plurality of digital signal output terminals; the serial data signal output terminal is electrically connected to the two serial data input terminals of the first register; and the two serial data input terminals of the second register are electrically connected to one digital signal output terminal of the first register.
 7. The power supply test system of claim 6, wherein the display module comprises at least one first numeral tube and one second numeral tube; each of the first numeral tube and the second numeral tube comprises a plurality of digital signal input terminals; the plurality of digital signal output terminals of the first register are electrically connected to the plurality of digital signal input terminals of the first numeral tube; and the plurality of digital signal output terminals of the second register are electrically connected to the plurality of digital signal input terminals of the second numeral tube.
 8. The power supply test system of claim 6, wherein the control module further comprises a single-pole double-throw (SPDT); the SPDT comprises a first terminal, a second terminal, and a third terminal; the micro controller further comprises a first switch output terminal and a second switch output terminal; each of the first register and the second register further comprises a clock signal input terminal; the first terminal and the second terminal of the SPDT are electrically connected to the first switch output terminal and the second switch output terminal of the micro controller; and the third terminal of the SPDT is electrically connected to the clock signal input terminals of the first register and the second register.
 9. The power supply test system of claim 8, wherein when the first terminal and the third terminal of the SPDT are electrically connected, the control module displays the predetermined temperature value on the display module; and when the second terminal and the third terminal of the SPDT are electrically connected, the control module displays the value of the temperature signal in the test chamber on the display module.
 10. The power supply test system of claim 1, further comprising a power module adapted to convert an AC voltage to the second DC voltage.
 11. A power supply test system for testing reliability of a power supply, the power supply test system comprising: a switch module adapted to input a predetermined temperature value; a temperature detecting unit adapted to detect temperature signals of the power supply; a control module adapted to receive the temperature signals; and a refrigerating and heating module, wherein the control unit sends a first control signal to the refrigerating and heating module when a value of the temperature signal is less than the predetermined temperature value, the refrigerating and heating module is adapted to heat the power supply upon receiving the first control signal; the control unit sends a second control signal to the refrigerating and heating unit when a value of the temperature signal is greater than the predetermined temperature value, the refrigerating and heating module is adapted to refrigerate the power supply upon receiving the second control signal until the value of the temperature signal is equal to the predetermined temperature value.
 12. The power supply test system of claim 11, wherein the control module comprises a micro controller having at least one first control signal output terminal; the refrigerating and heating module comprises at least one first relay control unit and a refrigerating and heating unit; the first relay control unit comprises a first winding unit, a first switch unit, and a second switch unit; a first terminal of the first winding unit is electrically connected to the first control signal output terminal to receive the first control signal; a second terminal of the first winding unit receives a first DC voltage; a first terminal of the first switch unit is electrically connected to an anode of a second DC voltage; a first terminal of the second switch unit is electrically connected to a cathode of the second DC voltage; and second terminals of the first switch unit and the second switch unit are electrically connected to the refrigerating and heating units.
 13. The power supply test system of claim 12, wherein the micro controller further comprises at least one second control signal output terminal; the first relay control unit further comprises a second winding unit, a third switch unit, and a fourth switch unit; a first terminal of the second winding unit is electrically connected to the second control signal output terminals to receive the second control signal; a second terminal of the second winding unit receives the first DC voltage; a first terminal of the third switch unit is electrically connected to the cathode of the second DC voltage; a first terminal of the fourth switch unit is electrically connected to the anode of the second DC voltage; and second terminals of the third switch unit and the fourth switch unit are electrically connected to the refrigerating and heating units.
 14. The power supply test system of claim 13, wherein the switch module comprises at least one first switch and one second switch; the micro controller further comprises a temperature signal input terminal, at least one first data input terminal, and a second data input terminal; first terminals of the first switch and the second switch are electrically connected to the temperature signal input terminal; and second terminals of the first switch and the second switch are electrically connected to the first data input terminal and the second data input terminal respectively.
 15. The power supply test system of claim 14, further comprising a decoding module electrically connected to the control module, and a display module electrically connected to the decoding module; and the decoding module decodes the temperature signals to temperature values and display the temperature values on the display module.
 16. The power supply test system of claim 15, wherein the micro controller further comprises a serial data signal output terminal; the decoding module comprises at least one first register and one second register; each of the first register and the second register comprises two serial data input terminals and a plurality of digital signal output terminals; the serial data signal output terminal is electrically connected to the two serial data input terminals of the first register; and the two serial data input terminals of the second register are electrically connected to one digital signal output terminal of the first register.
 17. The power supply test system of claim 16, wherein the display module comprises at least one first numeral tube and one second numeral tube; each of the first numeral tube and the second numeral tube comprises a plurality of digital signal input terminals; the plurality of digital signal output terminals of the first register are electrically connected to the plurality of digital signal input terminals of the first numeral tube; and the plurality of digital signal output terminals of the second register are electrically connected to the plurality of digital signal input terminals of the second numeral tube.
 18. The power supply test system of claim 16, wherein the control module further comprises a single-pole double-throw (SPDT); the SPDT comprises a first terminal, a second terminal, and a third terminal; the micro controller further comprises a first switch output terminal and a second switch output terminal; each of the first register and the second register further comprises a clock signal input terminal; the first terminal and the second terminal of the SPDT are electrically connected to the first switch output terminal and the second switch output terminal of the micro controller; and the third terminal of the SPDT is electrically connected to the clock signal input terminals of the first register and the second register.
 19. The power supply test system of claim 18, wherein when the first terminal and the third terminal of the SPDT are electrically connected, the control module displays the predetermined temperature value on the display module; and when the second terminal and the third terminal of the SPDT are electrically connected, the control module displays the value of the temperature signal in the test chamber on the display module.
 20. The power supply test system of claim 11, further comprising a power module adapted to convert an AC voltage to the second DC voltage. 